Black colored Speckled Australorps is actually bred having eggs design. Plumage was black colored which have small light places; ear-lobes is red-colored; comb try single. Off are white in the the color; shanks https://datingmentor.org/tr/oyun-tarihleme/ are white, a little pigmented rather than enough time.
73 and of cockerels 0.88 kg. The fresh new real time lbs out-of 150-day-old pullets are 1.82 and this out-of mature hens dos.dos kilogram. The new live pounds of cocks try dos.six kilogram.
The common yearly production of Black Speckled Australorps are 2 hundred egg consider 55 g. Egg shells try cream-colored. Fertility out of eggs try 95%, hatchability 80-85%. Success price of younger as much as 150 months is 95%; regarding people try 90%.
This new real time lbs away from 56-day-old pullets is actually 0
The new birds are very well adjusted so you can power keeping possibly directly or from inside the groups. Another feature is a high resistance to pullorum disease. He could be essential given that carriers of your recessive sp gene, that's guilty of this new white colour of the plumage and you will a much better look of carcasses. Regarding so it gene for the communities having the prominent Elizabeth gene carry out subscribe to the greater utilization because of the poultry industry.
RUSSIAN Light (Russkaya belaya)
That it breed try brought during 1929-53 of the mating Light Leghorn people that have females of regional populations, followed by inter se reproduction from crosses with various levels of Leghorn inheritance. Brand new crossbreeding inside Leghorns various resource - Danish, English, Western - each having its individual production and you can additional have. Selection met with the intent behind boosting egg creation, viability, rate of growth and live lbs.
Prior to 1965 Russian Whites had been the primary eggs-putting chickens regarding the USSR. An average annual design is 175-190 egg per level; egg lbs is 57-sixty grams. In breeding state farms the brand new egg creation of Russian Whites are 220-230 a-year. Although not, lower than industrial conditions Russian Whites cannot contend with brought in contours and you may crosses from Light Leghorns. They decrease behind because of the forty-fifty egg annually and also by as much as dos.5-step 3.0 g in eggs pounds.
Due to this fact new inventory of Russian Whites, that 1975 is 29.seven billion, got reduced so you can 4.4 billion by the 1980. He could be however used in big number into the Turkmenia, Uzbekistan and Azerbaijan.
At the moment, reproduction work at Russian Light birds is performed when you look at the Yasnaya Polyana breeding ranch in Stavropol area. Within the first stage (1967-69), reproduction are centered on choices and mothers was basically evaluated by its daughters' manufacturing. From inside the 1970 the new reproduction program are turned so you can creation of inbred contours (letter = 40) and a control people. A portion of the brand of inbreeding try between paternal half of-sibs, seldom between complete sibs. The fresh new birds hatched when you look at the 1973 got a keen inbreeding coefficient (Wright) regarding nearly 37%. The average production of the fresh half a dozen most useful inbred contours into the 475 weeks is actually 200-205 egg consider 54-56 g. The newest crosses of them contours got a high production - 211-236 eggs a year.
Chickens of this populace is light in the weight and develop small eggs. Their plumage try light; epidermis and you may shanks try purple; they have one comb.
New alive lbs of 8-week-dated pullets is 0.55 kg; that of cockerels is actually 0.56 kilogram. Mature hens weighing step one.6 kg, cocks 2.0 kg. Fertility out-of eggs reaches 93%; hatchability try 82%; endurance rates out-of young and you may grownups is actually 95 and you can 92% respectively. Eggs design toward 1st and you can intermediate inhabitants while in the 70 weeks away from every day life is 182 and you may 206 egg out-of 55 grams.
Of some attract is the inhabitants off Russian White birds from the brand new The-Connection Search Institute of Ranch Animal Reproduction and Family genes. It absolutely was created by selection for resistance to subnormal heat into the the first days of lifetime and for high egg manufacturing. Birds was free of leukosis while having a premier effectiveness Marek's state and carcinomas off organs. Girls are increased at temperature that are 8-ten less than regular. Back in 1984 which society designated five hundred direct.